gradstudent777

Recently, I met with a professor for advisement while he was setting up for an class exhibit which was opening that evening (I was not in the class which was exhibiting ). He was clearly overwhelmed, behind schedule and was not going to have everything ready for the opening. I mentioned I was free for an hour or so and helped him assemble some booklets. A classmate (she is in the same class taught my this professor) who was exhibiting in the show pulled me aside and reprimanded me for giving my unpaid labor to the professor. I explained that it looked like he needed help and continued to help him. In the days that followed she has ignored me completely. Was I being unethical by offer help to my professor? Maybe she thinks I have an advantage in the class because of this? Or is she just being petty and jealous?